Malignant neoplasms of thyroid and other endocrine glands (C73-C75)

ICD-10 codes C73 to C75 identify various types of malignant tumors located in the thyroid and other endocrine glands, serving as key references for coding cancers of these specific organs.

Code C73 focuses on malignant neoplasms of the thyroid gland, covering many forms such as follicular thyroid carcinoma and the more aggressive anaplastic thyroid carcinoma. These include common terms like papillary thyroid carcinoma and medullary thyroid carcinoma, helping coders match diagnoses with precise subtypes. Codes in the C74 series cover malignant tumors of the adrenal gland, distinguishing between cancers in the cortex (e.g., adrenal cortical carcinoma) and medulla (e.g., malignant pheochromocytoma), and specifying sides when known. This range also includes neuroblastomas, which may metastasize to an adrenal gland. The C75 codes cover less common malignant tumors of other endocrine-related glands such as the parathyroid (parathyroid carcinoma), pituitary (pituitary carcinoma), pineal gland, carotid body, and aortic body. These codes aid in identifying primary malignancies in less frequently affected endocrine tissues or when multiple glands are involved.